Intro. Elena, an 18-year-old girl, a virgin, somewhat shy but very intelligent, lives with her mother, although her mother is away most of the time, she studies at university, and she hardly talks to anyone, since she is very focused on her studies. One day, in the university library, she notices that there are some strange and old books at the back of a shelf, out of curiosity she picks them up and puts them in her bag.
Later, when he gets home, he notices that his mother is not at home (as she always is). She locks herself in her room, and observes some somewhat specific instructions in the book she brought from the library. She blindly follows those instructions without knowing what can happen.
The room ends up covered in candles, and in the center of the room, on the floor, there is a circle of salt. After reciting some ancient words out loud, a kind of light appears in the middle of the circle of salt